JPH0442853Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cleaning device for a corona discharger used in an electrostatographic apparatus such as a copying machine.

[Prior art]

In electrostatographic devices such as copying machines, corona dischargers are used to charge and remove static electricity from a given photoreceptor, or to transfer a formed toner image onto a given sheet of paper. .

This corona discharger is equipped with a corona wire, and the above-mentioned charging etc. are performed by the corona discharger from the wire.

[The problem that the idea attempts to solve]

Since this corona discharger becomes dirty with toner powder and dust, it is necessary to clean the corona wire in order to perform charging stably. No dedicated cleaning device is known, and the corona discharger must be removed from the electrostatographic apparatus each time it is cleaned, which is a hassle.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a cleaning device that can extremely easily clean the corona wire of a corona discharger used in an electrostatographic apparatus, and moreover, without removing the corona discharger from the electrostatographic apparatus each time. It is about providing.

[Means for Solving the Problems] According to the present invention, in a cleaning device for a corona discharger provided facing an opening for inserting a corona discharger formed in a frame of an electrostatic photographic device, A support stand 1 fixed to the frame body, a support arm 2 provided on the support stand, a support shaft 3 rotatably provided on the support arm, and can be rotated integrally with the support shaft. A board 5 and a guide piece 1 provided in a similar manner
1, and the substrate 5 has a notch 7 that penetrates the corona wire 21 stretched in the internal space of the corona discharger.
A cleaning member 6 is provided in the notch 7, and the substrate 5 is biased so as to be parallel to the insertion direction of the corona discharger, and the guide piece 11 is , has a substantially flat guide surface 11a, and the guide surface 11a and the substrate 5 are provided at an angle of approximately 90°, so that when inserting the corona discharger, the corona discharger When the tip of the electric appliance comes into contact with the guide surface 11a of the guide piece, the guide piece 11 rotates and the board 5 stands upright in the internal space of the corona discharger.By further inserting the corona discharger, the corona discharger is removed. A cleaning device is provided in which the corona wire 21 of the discharger rubs against the cleaning member 6 of the substrate to clean the corona wire.

That is, according to the cleaning device of the present invention, the corona wire of the corona discharger is automatically cleaned when the corona discharger is installed in or removed from an electrostatic photographic device such as a copying machine. Inconveniences such as getting your hands dirty with toner powder etc. are effectively avoided. Furthermore, there is no need to take out the corona discharger for cleaning.

〔Example〕

The present invention will be described in detail below based on specific examples shown in the accompanying drawings.

A first diagram showing a perspective view of the cleaning device of the present invention.
In the figure, in an electrophotographic apparatus such as a copying machine, this device is a support arm 2 provided on a support stand 1 fixed to a frame housing an image forming mechanism.
and a support shaft 3 rotatably provided on the support arm 2, and this cleaning device faces the opening 1' for inserting the corona discharger formed in the frame. It will be established.

The cleaning device of the present invention includes the following steps when installing or removing the corona discharger in an electrophotographic device:
This is automatically cleaned. This corona discharger is shown in FIG. In FIG. 2, this corona discharger includes a corona wire 21 extending inside a shield wall 20, and a corona wire 21 extending inside a shield wall 20.
It consists of holders 22 and 23 that support both ends of the holder.

Further, one holder 22 is provided with an electrode terminal 24, and the other holder 23 is provided with a handle 25. Further, the shield wall 20 is open at the lower side in the figure, and a discharge opening surface 26 is formed. That is, the space between the holders 22 and 23 is a substantially rectangular parallelepiped-shaped cavity, the lower surface of which serves as the discharge opening surface 26.

Furthermore, in the above-mentioned corona discharger, in order to smoothly perform cleaning by the cleaning device of the present invention which will be described later, the holder 22 in which the electrode terminal 24 is provided is provided with a notch 27 having an inclined guide portion 27a. It is preferable.

Returning again to FIG. 1, in the cleaning device of the present invention, a base plate 5 and a pair of guide pieces 11 are attached to the support shaft 3 so as to be able to rotate integrally therewith.
11 are provided.

The peripheral edge of the substrate 5 is covered with a cleaning member 6 such as felt, and as a whole, the inner space of the corona discharger (the shield wall 20 and the holder 2
The cutout 7 has an outer shape that matches the space defined by the holes 2 and 23, and is formed with a notch 7 through which the corona wire 21 of the corona discharger can pass. That is, when the corona discharger is inserted into the apparatus through the opening 1', the substrate 5 slides in the internal space of the corona discharger, and at this time, the cleaning member 6 touches the shield wall of the corona discharger. Cleaning is performed by rubbing against the inner wall of No. 20 and the corona wire.

Furthermore, a pair of guide pieces 11, 11 are provided at the base of the board 5 so as to sandwich it therebetween.
As mentioned above, this is also designed to be able to rotate integrally with the support shaft 3. This guide piece 11 is formed with a substantially flat guide surface 11a,
This guide surface 11a is provided on the support shaft 3 so as to form an angle of approximately 90° with the substrate 5.

Furthermore, the support shaft 3 has one end attached to the support base 1.
A coil spring 10 is provided which is fixed to the opening 1' of the corona discharger so that the substrate 5
The support shaft 3 is spring-biased so as to be held parallel to the direction of insertion. In this case, any means may be used as long as the substrate 5 is biased in a horizontal state; for example, it is possible to use the own weight of the substrate, etc., without using a spring or the like.

The cleaning mechanism of the cleaning device of the present invention will be explained with reference to FIGS. 3-A to 3-C.

A cleaning device (indicated as a whole by A) of the present invention is arranged facing and outside said opening 1', and a corona discharger (indicated as a whole by B) passes through this cleaning device A. It is inserted into the electrostatographic apparatus through the opening 1' (No. 3-A).
(see figure). In this case, the substrate 5 is the corona discharger B
Since it is held parallel to the direction of insertion, its insertion can be carried out very easily.
Further, at this time, the guide piece 11 passes through a notch 27 provided in the holder 22 of the corona discharger B.

When the corona discharger B is further inserted, the guide surface 11a of the guide piece 11 comes into contact with the inclined guide part 27a of the notch 27 and rotates, and then the shield wall 2
0 and is held in an almost horizontal state by contacting the lower end of the
In this state, the corona discharger B is inserted (see Figure 3-B). Along with this rotation of the guide piece 11,
When the board 5 also rotates and the guide piece 11 becomes horizontal, the board 5 becomes upright in the space inside the corona discharger B, and the corona discharger B is inserted in this state. In this case, the corona wire 21
Since it rubs against the notch 7 of the substrate 5, the cleaning is effectively performed. Further, in this embodiment, since the substrate 5 has an external shape that fits or fits into the internal space of the corona discharger B, the corona discharger B is inserted with the substrate 5 in an upright state. As this progresses, the cleaning member 6 also rubs against the inner surface of the shield wall 20 of the corona discharger B, so that the inner surface of the shield wall 20 is cleaned simultaneously with the cleaning of the corona wire 21.

Furthermore, when the corona discharger is further inserted and the electrode terminal 24 of the discharger B is finally inserted into a predetermined insertion port (not shown) and fixed in position,
The holder 23 on the opposite side and the substrate 5 come into contact with each other, and the substrate rotates to a horizontal state, so that the holder 23 is positioned on the substrate 5 (see Fig. 3-C).

In this state shown in Fig. 3-C, the corona discharger B is
Used for purposes such as charging and eliminating static electricity.

In removing the corona discharger B, each member of the cleaning device acts in the exact opposite manner to the above steps, and the corona wire 21, the inner wall of the shield wall 20, etc. are effectively cleaned.

In the cleaning device of the present invention described above, the cleaning member 6 and the corona wire 21
To soften the contact with the support arm 2
is preferably provided on the support base 1 via an elastic member 40 such as a spring (see FIG. 1).

Furthermore, in the accompanying drawings mentioned above, an example was explained in which the shield wall is cleaned at the same time as the corona wire is cleaned.
Of course, it is also possible to only clean the corona wire; in this case,
The outer shape of the substrate 5 only needs to be large enough to be accommodated within the shield wall 20.
It is not necessary to have a shape that fits or fits into the inner space. In addition, the cleaning member 6 also
It is sufficient if it is provided only in the notch 7 portion.

[Effect of idea]

According to the present invention, cleaning of the corona wire can be performed automatically when the corona discharger is attached to or detached from the electrostatographic apparatus, and the corona discharger can be attached to the electrostatographic apparatus for the sole purpose of cleaning the corona wire. There is no need to remove it, and there is no need to worry about getting your hands dirty when cleaning it.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a preferred example of the cleaning device of the present invention, FIG. 2 is a perspective view of a corona discharger, and FIGS. 3-A to 3-C are views of the cleaning device of the present invention. It is a figure showing an effect. 2...Support arm, 3...Support shaft, 5...Substrate, 6...Cleaning member, 7...Notch.

Claims (1)

[Claims for Utility Model Registration] A cleaning device for a corona discharger provided facing an opening for inserting a corona discharger formed in a frame of an electrostatic photographic device, which is fixed to the frame. A support stand 1, a support arm 2 provided on the support stand, a support shaft 3 rotatably provided on the support arm, and a substrate 5 provided on the support shaft such that it can rotate integrally therewith. and guide piece 1
1, and the substrate 5 has a notch 7 that penetrates the corona wire 21 stretched in the internal space of the corona discharger.
A cleaning member 6 is provided in the notch 7, and the substrate 5 is biased so as to be parallel to the insertion direction of the corona discharger, and the guide piece 11 is , has a substantially flat guide surface 11a, and is provided so that the guide surface 11a and the substrate 5 have an angle of approximately 90°, so that when inserting the corona discharger, the corona discharger When the tip of the electric appliance comes into contact with the guide surface 11a of the guide piece, the guide piece 11 rotates and the board 5 stands upright in the internal space of the corona discharger.Furthermore, by inserting the corona discharger, the corona A cleaning device characterized in that the corona wire 21 of the discharger rubs against the cleaning member 6 of the substrate to clean the corona wire.